Soarin' Closed Temporarily Due to Guest "Escape"

So, apparently, a guest on Soarin' was able to exit the ride just before it went into motion yesterday, causing all sorts of questions about the safety of the restraint system for the attraction. (It was unclear if the guest was buckled in at all or how the guest was able to circumvent the restraint system.) No one was injured in yesterday's ordeal, but both the Epcot and California Adventure versions of Soarin' have been temporarily shut down, pending an investigation of the obviously-not-fail-proof restraint system.